28989009744 has 80 divisors (see below), whose sum is σ = 79618868352. Its totient is φ = 9068460544.

The previous prime is 28989009733. The next prime is 28989009761. The reversal of 28989009744 is 44790098982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189207 + ... + 306230.

Almost surely, 2^28989009744 is an apocalyptic number.

28989009744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28989009744 is an abundant number, since it is smaller than the sum of its proper divisors (50629858608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28989009744 is a wasteful number, since it uses less digits than its factorization.

28989009744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495524 (or 495518 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 60.

The spelling of 28989009744 in words is "twenty-eight billion, nine hundred eighty-nine million, nine thousand, seven hundred forty-four".